Drilling machine



Aug. 6, 1929. w. NOBLE 1,723,249

DRILLING MACHINE Filed May 18, 1923 2 sheets-sheet 1 Aug. 6, 1929. w. NOBLE DRILLING MACHINE Filed May 18, 1923 2 Sheets-Sheet` 2 I N v EN n y: www f, fy/MM MW 7M Patented Aug. 6, 1929.

UNITED STATES 1,723,249 PATENT OFFICE.

WILLIAM NOBLE, OF NORTHAMPTON, MASSACHUSETTS, ASSIGNOR, `BY MESNE AS- SIGNMENTS, TO FROPHYLAC-TIC BRUSH COMPANY, OF NRTHAMPTON, MASSA CHUSETTS, A COBPORA'ON MASSACHUSETTS.

DRILLING MACHINE.

Application filed May 18,

My present invention has for its object to provide a machine tor drilling holes in articles such, for instance, as the handles of celluloid or bone tooth brushes. The machine embodying my invention, in the particular form in which I have put it intoy actual practice, is intended to drill the holes in he handles of celluloid tooth brush blanks. fis will be understood by those skilled in the art,'these handles are termed by being molded in dies under pressure, and the hole in the end ofthe handle by which the completed 'tooth brush may be hung up is partly formedy by the dies, but a web is lett, closing the hole. This web must be removed by a drilling operation. The particular object of the invention :is to provide a drill to pertorm this operation at high speed and in an accurate and economical manner. f

The invention will be lully understood vfrom the following description when taken in connection with the accompanying draw*` ings, and the novel features thereof will be pointed ont and clearly delined in the claims at the close of this specification. In said (h'awings f f Fi 1 is a plan view and Fig. 2 a section of a tooth brush blank to be drilled on the ma.- chine embodying my invention.

Fig. 3 is a side elevation ot the machine.

Fig. l is a top plan view oit the machine embodying my invention. j n

Fig. 5 is a section taken on linee-5 oty Fi Arure 4;.

Referring now to the drawings, and par ticularly to 1 and 2, there is shown'a tooth brush blank A in the condition in which it. is when it comes from the molding dies. At the end oit the handle portionis a hole B which is closed by'a webb, the object of the machine being to remove this web. y

Referring to Figs. 3 and el, the machine is provided with a frame@ having a pedestal 1l on which is mounted a table 12 which rotates intermittently about a hub 13 rising trom the top of the pedestal. The top of the table provided with a series oil raised spacing,y members 14 between each adjacent pair et which there is a space of the size and shape necessary to receive a tooth brush handie. These handles, designated A, are set in between the spacing memberiat the iront i of the machine with their inner ends abutting against a stationary cam 15 secured to the 1923. Serial No. 639,990.

hub 13 of the pedestal. There is also secured to the pedestal a stationary guide flange 1G oi: the table in the rearward left-hand quadrant and ends in the first part of the rearward right-hand quadrant, this being the kquadrant in which the ejection takes place. The guide flange also terminates :in the first part of the latter quadrant. The radial distance between the guide [lange 16 and the cam. 15 in the rearward lefthand qnai'lrant is approximately equal to the .length of a toothbrush blank. 1n the two forward quadrants, the cam 15 is cut away, as shown at c, these being the quadrants in which the undrilled brush blanks are put in place by the operator. From the foregoing it will be seen that the operator places a brush blank .in each ot the spaces between the two adjacent partitions 14; without taking` care to position the blanks radially. As the table ro tates, the cam 15 gradually pushes in an outward radial direction any blanks which come in contact therewith, while any blanks which come in Contact with the flaring end 17 of the guide llange are pushed inwardly in a radial direction. This occurs just as the blanks arrive at the beginning olI the rearward lelt-lnrnd quadrant, as viewed in Fig. 4l. Thereafter, they are held properly positioned between the concentric edge oit' the cam 15 and the concentric edge of the guide flange 1G until they have passed the drills, have been drilled and are ready to be ejected from the inaohine. Theejcction apparatus will be described hereinafter.

In the drawings l have shown two drills which operate simultaneously ron alternate brush handles, the drills being' spaced some distance apart, as viewed in Fig. 4, to provide space 'for the operating mechanism. In practice, thedri ll 15) bores the handle which is just passing; troni the rearward left-hand quadrant into therearward righthand quadrant, while the drill 18 bores an alternate blank seven spaces to the lett. It will also space between Successive teeth.

be understood that after each pair orn holes is drilled, the table is rotated through an angular space equal to the angular space occupied by the number otl brushbaclrs which are drilled simultaneously. lt is also to be understood that l do not limit mysel'tl to a machine which drills two brush backs simultaneously since additional drill spindles can he provi/den, in which case the table will be caused to move through an angular space. equal to the anginar space occupied by the blanks which drilled simultaneously. lnasmuch as in drilling work oit this character, it is structurally impossible to enga adjacent blanks, the drills should be positioned so that no blank will be brought under a drill a second time. This is accomplished in the 'construction illustrated by providing a number ot blank positions between the drill which is a multiple ot' the number ot drills employed.

The main driving shalt ot the machine is shown at 20, being driven by a belt l running on a pulley On the main driving sha-tt 2l) are two pulleys 93 which drive pulleys 2l on the drill spindles by means of two quarterturn belts Q6 and 2T. The drill spindles are carried in brackets 2S and normally are held out ot Contact with the worlr by springs 29 acting on collars 30.

rllhe main drive shalt 2l) also carries sprocket wheel 3l over which runs a chain 8 which drives another sprocket wheel 83 las to a shalt. The shalt 3l is provided witl a. worin which meshes with a worm gear 3c on a vertical cam shaft 37. This cam shaft carries tour cams, to wit, the ratchetcam 238, the stop cain 39, the drill cam di), and the ejector cam ll. The ratchet cam 38 actuates an arm d2 pivoted at e3 to the 'traine ot the machine. This arm swings in a horizontal plane and is located under the table. it the inner end ot this arm is bolted, as shown at sie, a second arm which carries a pawl le held by means of a spring 48 against. teeth el? formed in a ratchet wheel l0 rigidly secured to the table l2. The position ot the second arni l5 relative to the arm l2 can be adjusted by the bolt 1A, and in this way the table can be positioned accurately with regard to the drill spindles at the end of cach movement. As previously stated, the angular space through which the table r ust be rotated alter each operation is determined by the number ot blanks which are drilled simultaneously and therefore the angularspace between the adjacent teeth el? will be determined in the the saine way. Y

.es it is essential that the table should be brought to a stop alter each forward movement in exact-ly the right vposition and should not be j erinitted to overrun, l provide a stop linger 4.9 adapted to enter the holes 50 in the rEhe finger 5l pivoted i9 is formed on the end of a lever at 52 and is operated by the stop cam S9. This cani is so constructed that the linger will be L wnhdrawn just betere the iorward 'tee/cling movement talres place, thereby releasing the table, and will be inserted in the next hole, accrrately positioning the table gust betere the ict with the handles.

drills con The dinl spindles are moved vertically against the springs 2S) by means ot a Y-shaped lever 53 pivoted at 5l and two arms e and which contact with the tops ot the drill 'llhe tail ot the `i"-shaped lever 5.53 ed by a vertical plunge slidable in `uichs on the bracllzet 2S which iiorins a art ot the :traine oit the machine. rl`he lower end ot' the rod cari" es a roll which rests he drill cani l0, ilreadjv referred to. lt be seen that as the cani ll) revolves, raie the member 5:5, swir J the Y Ybout its pivot 5l and depressing the A imultaneously against. the prY ol the springs Q9. lt will also be seen tl the springs restore the parts to their former position as the cam roll 5T rides the cani l0.

During the drilling operation it is essential that the blanks e held iirmly to prevent displacement. Accordingly, the cani meinher l5 and the guide member 16 are provided with projecting portions (Z and a respectively, said projections being in radial alignment with the drills and extending out over the path oit the blanks, as shown in Fig. llhen the lilanl comes into position to be drilled, its ends are underneath these projections and itl is therefore prevented from tipping up and being displaced. A

it 60 is shown a cam roll engaging the ejectorcain ll. This cam roll is mounted on one end ott a slide rod 6l carried in guides G2 in a portion ot the traine of t-he machine. rlheV outer end ot the slide rod 6l is loosely connected to the ejector lever 63 pivoted at 6l to the frame et the machine. The cani roll 60 carried by the slide rod 6l is held in contact with the cam by means of a spring 65 acting on the ejector lever 69. rllhe ejector lever 63 carries on the end toward the table a downwardly extending finger 6G which, in normal position, is located adjacent tie innerend of the handles. lt will therefore be seen that each swinging movement of the ejector lever will knock the handles which are between it and the rim outward along a radial line so that they` will tall into a. spout 67 by means of which they are conveyed away trom the machine.

`What l claim isl. ln machine oi"- the character described,

a revolving table, partitions forming radial- Y ly-arranged positions for the articles to be operated upon, a stationary cani member the periphery ot which isadjacent the inner ends ot said positions, said cani member having a portion which is concentric with the axis lof rotation of the said table, and another portion which is non-concentric therewith, the remainder of the cam being out away.

2. In a machine of the character described, a revolving table, a stationary rim adjacent the edge of the table, one end of the rim being lared away from the table, a stationary cam member 'the periphery of which is adjacent the inner ends oi the positions on the table, said cam member having a portion which is concentric with the aXis of rotation of the table and with said rim, and another portion which is non-concentric and flares away 'from the flaring portion of the said rim.

3. ln a machine ofthe character described, a revolving table, partitions thereon forming radially arranged positions for the articles to be operated upon, a plurality of drill spindles, pawl-operated meansvfor giving the table a step-by-step motion, a cam to actuate said means, common means for actuating said drill spindles, a cam therefor, said Cams being arranged to operate alternately, and stationary cam means for radially positioning the ar ticles between said partitions. y

il. In a machine of the character described, a revolving table, partitions thereon 'forming radially arranged positions for the blanks to be operated upon, a plurality or drill spindles similarly positioned with respect to n Said blank positions and each spaced to provide a number of blank positions therebetween which is a multiple of the number of drills eniployed, means for operating the saine, and means for intermittently rotating the table ythrough an angular space equivalent to the angular space occupied by the number of blank positions equal to the number of drillsk employed thereby bringing each o'f said posii ti ons opposite one of the drill spindles.

In testimony whereof I aiiix my signature.

VILLIAM NOBLE. 

